import java.util.HashMap;

/**
 * @date 2020/3/15 23:45
 */
public class Demo {
    static int a = 10;
    static {
        System.out.println("3");
    }
    {
        System.out.println("2");
    }

    Demo() {
        System.out.println("1");
    }

    public static void main(String[] args) throws InterruptedException {
//        System.out.println(Demo.a);
        while (true){
            Thread.sleep(500);
            System.out.println("===");
        }
    }
}
